Context-aware Threat Modeling and History Management in Pervasive Environment

Context-awareness is the ability of computing systems to acquire and reason about the situational context and adapt application accordingly. Context-aware system start with gathering of raw, low-level contextual data, interpret the raw contextual data into high-level interpreted context, reason the interpreted context to derive implications and adapt the application behavior on the basis of the implications. The paper identifies the components of contextaware computing and elaborates the context-aware process with the issues in each stage. In pervasive computing, a user might be part of various security domains at any particular instant of time having various authentication mechanisms and different privileges in different security domains. The paper presents a threat modeling approach for pervasive computing and presents the model for threat modeling and risk analysis in pervasive environment. A history module using modular approach is presented in conjunction with existing context-aware systems to provide user preference on the basis of usage history.